常見例句Vacuum vessel seal structure used in the leak test of a liquid rocket engine turbopump is discussed.論述了某型號(hào)液體火箭發(fā)動(dòng)機(jī)渦輪泵高壓低溫靜密封檢漏試驗(yàn)用真空室密封結(jié)構(gòu)的設(shè)計(jì)問題。 返回 leak-tested